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(No Model.)

H. A. BROWN. APPARATU FOR DRILLING AND OOUNTERSINKING. No. 380,311. Patented Apr. 8, 1.888.

WITNESSES: 11v VE/VTOB if BY QW M ATTORNEY N. Firms, mw-uam m nar. Washingtm. s2v c.

lhvrrnn STATES PATENT Fries.

APPARATUS FOR DRILLiNG AND COUNTERSINKING.

SPECIFICATION forming part of Letters Patent No. 380,311, dated April 3, 1888.

Application filed December 3. 1887. Serial No. 256,939. (No model) To aZZ 1072,0722, it may concern.-

Be it known that I, HENRY Anensros BROWN, acitizen of the United States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented a new and useful Apparatus for Drilling and Countersinking, of which the following is a specification, reference being bad to the accompanying drawings, forming part hereof.

There was patented to me, in Letters Patent of the United States No. 350,231, dated Octoher 5, 1886, a round bolt having an oblong convex head, the object being to furnish a bolt having a head which should be flush with the material in which it might be seated upon its exterior, the interior of the head being convex and the head oblong, so that when the head was seated in a corresponding countersink or concavity the bolt would be prevented from turning in its seat, as fully set forth in the specification attached to that patent. Such construction of bolt possesses advantages which render it exceedingly desirable for use in many relations where the old-fashioned round-headed and the square-shouldered bolts have been used. It is desirable for such use, however, and for the extension of such use that there should be some apparatus at hand by which the corresponding countersinks may be readily and cheaply formed.

The object of my invention, therefore, is to provide such an apparatus primarily, and, secondly, to combine therewith devices by which the drilling of the bolt-holes may first be done and then the proper countersinking be effected, all in the one organization-an organization simple and economical in construction, reliable in operation, and easily controlled and operated to which end the invention consists in the features, devices, and combinations more particularly hereiuafterdescribed and claimed.

In practicing my invention two frames are provided, one of which carries and sustains the drilling apparatus proper, while the other carries and sustains the reaming or countersinking apparatus. These two frames are secured to a common base which is itself pivoted, or they are hinged thereto so that either frame-work may be swung into position over a vise or other bed in or upon which is the material to be operated upon. Stops are provided and the parts so adjusted that as a framework is swung into position over the vise or bed the tool in such frame will be immediately over and in position to operate upon the ma terial at the desired point.

The reamer or countersinker is a disk with a periphery of proper configuration to give the desired shape to the countersink in the material and has cutting-teeth upon such periphery. It is mounted upon a shaft or spindle, which brings its periphery in contact with the material to be operated on, and which is supported in bearings attached to and sliding within the main frame-work for the reaming, so that it (the reamer) may be moved up and down as requiredmoved to the material in forming the countersink and away therefrom to be cleared from the material. The same end may be attained by securing the vise or bed for the work upon the head of ascrewshaft seated in a fixed nut, so that the work or material may be moved up or down or upon the head of a pillar sliding in a hollow cylinder, a lever attached to the pillar and projecting through a slot in the cylinder and pivoted therein or in a lug projecting therefrom serving to throw the pillar up or down.

An apparatus embodying these general features will accomplish the objects of my invention and carry it into effect. The invention may be better understood, however, by reference to the drawings, in which is shown an apparatus embodying the invention, and in which- Figure 1 is a top view of a complete apparatus embodying theinvention; Fig. 2, afront view thereof; Figs. 3, 4, and 5, side or edge views of three different styles of reamers; Fig.

6, a plan view of realner shown in Fig. 5; Figs. 7, 8, and 9, top views of the couutersinks made by such reamers; Fig. 10, a cross-section on the line as :0, Fig. 1; and Figs. 11 and 12, details of construction.

In these figures the reference-numerals l 1 indicate lugs or brackets to be affixed to and projecting from any suitable base for supporting pivotally the frames containing the operative parts.

2 is an upright post having pintles or pivots 3 at either end, which take into apertures in the brackets 1, so that 2 and whatever is attached thereto may be rotated. To this part are attached the two main frame-works A B,

A carrying the drilling apparatus proper, and B the reaming or countersinking apparatus. They are attached to the post at an anglepreferably a right angle -to each other, so that as the post is rotated or turned on its pintles one may be swung into operative position and the other out of such position. The frame A is rectangular, having the sides and ends 4 4 and a cross-piece, 5, in which is a nut. there being alsoa nut,6,in the upper end, 4. Through these nuts, and seated therein, is the screwthreaded shaft 7, carrying the drill 9 at the lower end, there being a hand-wheel, 8, on the upper end, so that the drill may be raised or lowered.

The frame B is compound, consisting of an inner and outer frame arranged to slide one upon the other. The outer frame consists of the two side pieces and cross top piece, 10 10 10, the top piece having a nut, 11, in which takes the screw-shaft 33. The inner frame consists of a base, 13, in which is seated and secured the reamer, the two side pieces, 12, and a cross-piece, 32, the end of the shaft 33 being secured to the latter by a swivel-joint. Upon the interior of the sides 10 guide-rails 34 should be fixed, taking in grooves in the exteriorof 12. It will be seen from this that by turning the shaft 33 in its fixed seat, the nut 11, the inner frame, with 13 attached, may be raised or lowered, sliding within 10 by the gu deways described. The base 13 has seated in it a shaft, 16, upon whose outer end may be arranged a band-wheel or a crank for communicating motion thereto, while its inner edge is formed as or carries a chuck for receiving one end of a spindle, 15, whose other end is ournaled at the other extreme of 13,the reamer 14 being secured upon such spindle 15. As, in operation, the strain upon the spindle 15 is from below, as the reamer is operating upon metal below it, a fork, 18, is used, the limbs of the fork spreading just sufficiently to clear the reamer 14, it being intended that a limb of the fork shall take on either side of the reamer. The end of each limb of the fork is notched, as at 19, these notches affording a bearing against sidewise or upward bending of the spindle. The shank of the fork is screwthreaded and provided with the two nuts 20, so that it is vertically adjustable.

Instead of a fork it is evident that two in-- dependent bearings might be used-that is, that the limbs of the fork might be separated and secured in position in the same manner.

Stops are provided, limiting the movement of the combined frames and posts in either direction, and'there should be provided means for locking the combined frames at both limits of motion. Such means are typified in this case by the spring-latches 31 31, which take up and hold either a side, 4, or a side, 10, as the case may be, looking one frame back and the other projectingat a right angle therefrom, it being the intention that the latter position shall be the operative one, and that the frames A B shall be so proportioned that as A is swung outward or as B is swung outward the point of the drill or the edge of the reamer shall be immediately over the same spot.

The construction of the reamers is shown in Figs. 3, 4, and 5. They are disks of metal,

of a width equal to the narrow part or breadth of the countersink desired, cutting or milling teeth being formed on their peripheries. In Fig. 3 the edge is square, the resultant countersink being as shown in Fig. 7. In Fig. 4 the edge is curved or oval, the resultant countersink being as seen in Fig. 8. In Fig. 5 the disk angles or tapers to an edge from a land in the center, the resultant countersink being of elliptical form, flaring in all directions from the bolt-head. Many other forms maybe devised, and, in fact, Ihave devised many forms, each giving a different contour to the countersink; but in each there is the same principlea disk with cutting-teeth on its periphery.

Beneath the point where either tool is to be brought into operation a suitable bed should be located for holding or receiving the material to be operated on. The preferable form of such bed is a vise, in whosejaws the material may be gripped and held, as is shown at 21 21, acting as the bed required. As so far described, devices are shown for feeding the tools to the work and then removing them therefrom; but the objects of the invention may be accomplished by feeding the work to the tools and then removing it therefrom. In fact, it may sometimes happen that the one method is preferable, while at other times the other method is preferable. I have therefore also shown methods of so feeding the work to the tools and removing it therefrom; but it is to be understood that it is not essential that both methods be used, the essential being that there be some means for keeping the material, the work, and the tool in contact while the latter is in operation. 7 One form of mechanism for feeding the material up to the tool is shown in Fig. 12. The vise 21 is secured to a base, 23, which is attached by a swivel-joint to the screw-threaded pillar 22, which takes in a fixed nut, 24, and which has the ordinary lever 37 in an aperture in its lower or free end. It is evident, then, if the milling-tool be deprived of vertical movement or movement toward the material, the material and the vise or bed in which it is secured may be moved to the milling-tool or reamer. In an alternative construction for the same end shown in Fig. 2 the vise is secured upon the head of a pillar, 26, seated in and capable of moving in the cylinder 25, in'

which, toward its base, is a slot, 27. Taking in a notch in the pillar 26 is alever, 29, which too is pivoted in a lug or bracket, 28, alongside the slot, its free end extending without the cylinder 25. It is evident that as the free end of this lever is elevated or depressed the reverse movement will be given to the pillar 26 and the material be thereby elevated to or removed from the reamer 14.

From this description it is readily seen that the material being secured in position, the frame A is swung to the front into'operative position and the bolt-hole drilled by the action of drill 9. Without change in the position of the material, the frame A is then swung back and the frame B simultaneously swung into position and the proper countersink made by reamer 14.

It is evident that the two frames A and B might be independently pivoted or hinged; but the form shown is preferable in that as one is moved the other is moved, while if independently hinged each would have to be separately moved.

Having thus described my invention, what I claim is- 1. The combination of a post or base pivotally mounted, a frame secured thereto and carrying a drilling mechanism, a frame secured thereto and carrying a milling or countersinking mechanism, and means for keeping the drills or the reamer and the material to be acted on in contact, substantially as set forth.

2. The combination, in a milling-machine, of a milling-tool made as a disk, having cuttin g or milling teeth upon its periphery, means for imparting rotation thereto, a frame carrying such means and the milling tool or wheel, anda second frame carrying such frame and means for moving the one frame Within the other, substantially as set forth.

3. The combination of a post or base pivotally mounted, a frame secured thereto and carrying a drilling mechanism, a frame secured thereto and carrying a milling or reaming mechanism, stops for limiting the movement thereof, and latches for locking them, so that one or the other mechanism is in operative position, substantially as set forth.

4. The combination of a post or base pivotally mounted, a frame secured thereto and carrying a drilling mechanism, a frame secured thereto and carrying a drilling or reaming mechanism, stops for limiting the movement of the above elements, latches for locking them in position, a bed for receiving and holding the material to be operated on, and means for keeping such material and the tool in opera tion thereon in contact, substantially as set forth.

In testimony whereof I have hereunto subscribed my name, in the presence of two witnesses, on this 21st day of November, 1887.

HENRY AUGUSTUS BROWN.

Witnesses:

Z. 13. WILBUR, B. L. PoLLocK. 

